Feed for explosion-engines.



N0. 650,266. .Patentd May 22, 1960;

w, .1. M6DUFF.;,

FEED FOR EXPLOSION ENGINES.

(Application filed Oct. 5, 1899.)

(No Model.) 2 SheetsSheet l.

L A 770/?NEYS No. 650,266. v Patented Nlay 22, 1900. w. J. MGDUFF.

FEED FUR EXPLOSION ENGINES.

(Applicationflled Oct. 5, 1899.) (No Model.) 2 Sheets-Shut 2.

( fl My a d a I if W/TNESSE S fN V N 70/? A 7TOHNEYS UNITED f STATES PATENT Q-effle \VILLIAM JOHN MODUFE, OF TILTON, NEW HAMPSHIRE.

FEED FCR EXPLOSION-ENGINES.

PECIFICATION forming part Of LettersjPatent NO. 650,266, dated May 22, 1900.

Application filed October 6. 1899- Serial No. 732,652. (No model.)

To all 1077/0111, it may concern: Be itknown that LWILLIAM JOHN Mo D urn,

of Tilton, in the county of Belknap and State.

description. v

My invention relates to an improvement in feed devices for supplying the oil or gasolene used in explosion-engines, the object being to provide a feed which may be regulated while the engine is running and which will accurately supply an exact amount of the oil or gasolene to the engine.

My invention comprises the novel features hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming apart of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a side view of a portion of an engine, showing my device attached thereto and the manner of operating it. Fig. 2 is a detail side elevation and partial section showing my device. Fig. 3 is a similar viewshowing the parts in a different position, and Fig. 4 is a similar View showing the device mountedin a slightly-different manner.

. In the operation of gasolene and similar ex;

plosion-engines in which an oil is used for obtaining power it is veryimportant that the amount of oil furnished at each stroke shall be capable of exact regulation and that the same amount shallbe furnished at eachstroke. This object is what is sought to be accomplished by my device. The device is, essentially,a pump of a peculiar construction which forces a definite amount of' oil into the passages connected either with a carbureting device or with the cylinder of the engine.

The cylinder A of the pump is open at both ends and is provided with two side extending ports a and a, the port acommunicating with a passage C, which contains the oil which is to be introduced to the engine. The port a communicates with a passage B, which leads either to a carbureting device or directly to the cylinder of the engine. The two ports a and a are arranged in the same side of the cylinderthat is, they aline lengthwise of the cylinder.

\Vithin the cylinder A are two plungers D and E, which fit the cylinder and completely fill the space therein.

the cylinder A may be provided with stuffing- :boXes or glands d and 6, only one of which is "shown in Fig. 2-, which surround the two If desired, the ends of plungers and prevent any possibility of leakage around the same. The plunger D is positively connected with a cross-head or block F, which is connected by means of a pin H or in any other suitable manner with the operating means therefor. This operating means may be of anysnitable construction, said construction varying with the position of the feeding device andwith the type of engine.

The means used for operating the pump does I not form any essential part of my invention. The means for operating the pump shown in Fig. 1 consists of a lever J, which is pivoted at J to the frame of the engine and has a link It connected with one end thereof and 'with'thepin H upon the cross-head or block roller J in engagement with the cam K.

The cross-head F, as hereinshown, is provided withan aperture or apertures adapted to receive the end of the plunger D, which for this purpose is bent backward upon itself at D into the shape of an inverted letter J and is secured in place in the crosshead by means of set-screws f. The-plunger E, which projects from the opposite end of the cylinder A, passes through an opening in an arm F upon the block F, which opening is of such size that the plunger may slide freely therein. In an arm F opposite the arm F is placed a set-screw G, which is provided with a locknut, so that it may be securely held in any adjusted position. with the plunger E and is adapted to engage the end thereof to carry the plunger in one direction. The plunger E is moved in the other direction by abutting engagement with the end of the plunger D.

The operation of my device is as follows: In the position shown in Fig. 2 the abutting ends of the two plungers lie within the port a, which communicates with the oil-supply.

This set-screw is in line 5 When the cross-head F is moved upwardly, the plunger D moves'promptly therewith, as it is fixedly secured to the cross-head, while the plunger E does not start to move until it is engaged by the set-screw G. In consequence of this the inner ends'of thetwo plungers are separated, and when the plunger E is carried along an amount of oil is carried with it equal to the space between the ends of the plungers. The movement of the plunport to the other.

plunger D noves 0d promptly, while the plunger E is held; against moving until itis ei'igaged by the end of the plunger D. This forces the oil between the two plungersout tion with a carbureting device or with the cylinder of the engine. delivered is' controlledby adj listing the slack between the two plunger-s by means of the set-screw GA This may be readily done While the engine is in motion, as the stroke of the plunger is comparatively slight.

' In Fig. 4 the device is shown mounted in a different manner. In this case the plungers are placed over the passage B, which communicates with the engine-cylinder, and the oil'is supplied through, a pipe 0, which is. provided with a throttle-valve N, by which the Gil-supply may be cut off when desired. In this figure'a vent-cock M is shown as connectedwith the port a, so that any 'air which may enter the oil-sup ply pipe m ay be promptly blown out.

Having thus fully described my invention,- I claim as new and desire to secure by Letters Patent 7 j e 1, Apump comprisinga cylinder havinginlet and discharge ports, a plunger fitted to slide in said cylinder and projectingtherefrom at one end, said projecting portion of the plunger having a return member extending longitudinally of the cylinder on the outside thereof, a reciprocating actuating member to which the return member of said plunger is secured, saidactuating member being pro gers within the cylinder is suflicient to carry. the abutting ends of the plun'gers from one The other limit of the stroke of the plungers is shown in Fig. 3'. Upon the return stroke of the cross-head the,

into the chamberB, which is in' commu'nic'a The amount of on vided with an adjusting-screw forming an abutment and extending lengthwise with respect to the cylinder, and a second plunger likewise fitted to slide in the cylinder and adapted to engage said adjustable abutmentscrew, the length'of said second plunger bein gsmaller than the distance between the inner end. of the first plunger and the screw of l the actuating member.

2. A pump comprising a cylinder having sideinlet and discharge ports, plungers fitting -rsaid'cylinder and projecting from opposite ends thereof, saidplungers being movable to transfer their abutting ends from one port to the other, and an actuating member having a positive connection with one or said plungers, and provided with an aidj'u'stablemem ber' abuttinglyengaging the outer end of the other plunger, whereby the slack betweenthe .plungers may be adjusted, substalltially as described.

3. A pump comprising a cylinder having inlet and discharge ports, two plungers' fitting able to transfer their abutting inner ends from one port to the other, an actuating member shavin -a )osit-ive connection with one of'said o a I v. plungers, sald actuating member having a guide receiving an end of the other plunger,

and an adj usting-screw secured to the actuating member and adapted to engage the outer end of said plunger,- whereby the slack "between the two plungers may be adjusted substantially as described.

WILLIAM JOHN MoDUFF.

Witnesses: I

ARTHUR M. LORD, ARTHUR T. CASS. 

